/*
 * Copyright 2010 Francisco Modesto
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.googlecode.gwt.tinyaop.rebind;

import com.google.gwt.user.rebind.SourceWriter;

public class ProxyBuilder implements Builder {
  private int methods;
  private boolean isInterface;

  public ProxyBuilder(int methods, boolean isInterface) {
    this.methods = methods;
    this.isInterface = isInterface;
  }

  @Override
  public void create(SourceWriter writer) {
    writer.println();
    writer.println("@Override");
    writer.println("public Object getRealTarget() {");
    writer.indentln("return " + target() + ";");
    writer.println("}");
    writer.println();
    writer.println("@Override");
    writer.println("public MethodDescriptor[] getInterceptedMethods() {");
    writer.indentln("return new MethodDescriptor[] { " + methods() + " };");
    writer.println("}");
  }

  private String target() {
    return isInterface? "_instance" : "this";
  }

  private String methods() {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < methods; i++) {
      if (i != 0) {
        sb.append(", ");
      }
      sb.append("_METHOD_").append(i);
    }
    return sb.toString();
  }
}
